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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "spreadsheetdelegate.h"

#include <QtWidgets>

SpreadSheetDelegate::SpreadSheetDelegate(QObject *parent)
        : QItemDelegate(parent) {}

QWidget *SpreadSheetDelegate::createEditor(QWidget *parent,
                                          const QStyleOptionViewItem &,
                                          const QModelIndex &index) const
{
    if (index.column() == 1) {
        QDateTimeEdit *editor = new QDateTimeEdit(parent);
        editor->setDisplayFormat("dd/M/yyyy");
        editor->setCalendarPopup(true);
        return editor;
    }

    QLineEdit *editor = new QLineEdit(parent);

    // create a completer with the strings in the column as model
    QStringList allStrings;
    for (int i = 1; i<index.model()->rowCount(); i++) {
        QString strItem(index.model()->data(index.sibling(i, index.column()),
            Qt::EditRole).toString());

        if (!allStrings.contains(strItem))
            allStrings.append(strItem);
    }

    QCompleter *autoComplete = new QCompleter(allStrings);
    editor->setCompleter(autoComplete);
    connect(editor, &QLineEdit::editingFinished, this, &SpreadSheetDelegate::commitAndCloseEditor);
    return editor;
}

void SpreadSheetDelegate::commitAndCloseEditor()
{
    QLineEdit *editor = qobject_cast<QLineEdit *>(sender());
    emit commitData(editor);
    emit closeEditor(editor);
}

void SpreadSheetDelegate::setEditorData(QWidget *editor,
    const QModelIndex &index) const
{
    QLineEdit *edit = qobject_cast<QLineEdit*>(editor);
    if (edit) {
        edit->setText(index.model()->data(index, Qt::EditRole).toString());
        return;
    }

    QDateTimeEdit *dateEditor = qobject_cast<QDateTimeEdit *>(editor);
    if (dateEditor) {
        dateEditor->setDate(QDate::fromString(
                                index.model()->data(index, Qt::EditRole).toString(),
                                "d/M/yyyy"));
    }
}

void SpreadSheetDelegate::setModelData(QWidget *editor,
    QAbstractItemModel *model, const QModelIndex &index) const
{
    QLineEdit *edit = qobject_cast<QLineEdit *>(editor);
    if (edit) {
        model->setData(index, edit->text());
        return;
    }

    QDateTimeEdit *dateEditor = qobject_cast<QDateTimeEdit *>(editor);
    if (dateEditor)
        model->setData(index, dateEditor->date().toString("dd/M/yyyy"));
}